MIC3003GFL
FOM Management IC
with Internal Calibration
General Description
The MIC3003GFL is a fiber optic module controller which
enables the implementation of sophisticated, hot-pluggable
fiber optic transceivers with intelligent laser control and an
internally calibrated Digital Diagnostic Monitoring Interface
per SFF-8472. It essentially integrates all non-data path
functions of an SFP/SFP+ transceiver into a tiny (
3mm x 3mm
)
MLF
®
package. It also works well as a microcontroller
peripheral in transponders or 10Gbps transceivers. The
MIC3003GFL uses the same die as the MIC3003 with all its
functions, but in a smaller package and different pin out.
A highly configurable automatic power control (APC) circuit
controls laser bias. Bias and modulation are temperature
compensated using dual DACs, an on-chip temperature
sensor, and NVRAM look-up tables. A programmable
internal feedback resistor provides a wide dynamic range for
the APC. Controlled laser turn-on.
An analog-to-digital converter converts the measured
temperature, voltage, bias current, transmit power, and
received power from analog to digital. An EEPOT provides
front-end adjustment of RX power. Each parameter is
compared against user-programmed warning and alarm
thresholds. Analog comparators and DACs provide fast
monitoring of received power and critical laser operating
parameters. Data can be reported as either internally
calibrated or externally calibrated.
An interrupt output, power-on hour meter, and data-ready
bits add user friendliness beyond SFF-8472. The interrupt
output and data-ready bits reduce overhead in the host
system. The power-on hour meter logs operating hours
using an internal real-time clock and stores the result in
NVRAM.
In addition to the features listed above, the MIC3003
features an extended temperature range, options to mask
alarms and warnings interrupt and TXFAULT, a reset signal
source, and the ability to support up to four chips with the
same address on the serial interface. It also supports eight-
byte SMBus block writes.
Communication with the MIC3003 is via an industry
standard 2-wire SMBus serial interface. Nonvolatile
memory is provided for serial ID, configuration, and
separate OEM and user scratchpad spaces.
Datasheets and support documentation can be found on
Micrel’s web site at:
www.micrel.com.
Features
•
Packaged in a ultra small (3mm x 3mm) 24-pin MLF
®
package
•
Extended temperature range
•
Alarms and warnings interrupt and TXFAULT masks
•
Capability to support up to four devices on one SMBus
•
APC or constant-current laser bias
•
Turbo mode for APC loop start-up and shorter laser turn
on time
•
Supports multiple laser types and bias circuit topologies
•
Integrated digital temperature sensor
•
Temperature compensation of modulation, bias, bias fault
and alarm thresholds via NVRAM look-up tables
•
NVRAM to support GBIC/SFP serial ID function
•
User writable EEPROM scratchpad
•
Reset signal
requirements
compatible
with
some
new
systems
•
Diagnostic monitoring interface per SFF-8472
– Monitors and reports critical parameters:
temperature, bias current, TX and RX optical power,
and supply voltage
– S/W control and monitoring of TXFAULT, RXLOS,
RATESELECT, and TXDISABLE
– Internal or external calibration
– EEPOT for adjusting RX power measurement
•
Power-on hour meter
•
Interrupt capability
•
Extensive test and calibration features
•
2-wire SMBus-compatible serial interface
•
SFP/SFP+ MSA and SFF-8472 compliant
•
3.0V to 3.6V power supply range
•
5V-tolerant I/O
Applications
•
•
•
•
•
•
SFP/SFP+ optical transceivers
SONET/SDH transceivers and transponders
Fibre Channel transceivers
10Gbps transceivers
Free space optical communications
Proprietary optical links
MLF and
MicroLeadFrame
are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
July, 2010
M9999-072910-A
hbwhelp@micrel.com
or (408) 955-1690
MICREL [ MICREL SEMICONDUCTOR ]
